1) In Chapter 5, in the first poem/group of verses, it is said that one should avoid sleep. One cannot avoid sleep. It is known that not sleeping brings mental ilness and physical weekness. In fact its used as a form of torture. So, how can we understand such advice: avoid sleep?

2) In the same chapter and in the same group of verses it is state: always beg for food, not acepting meal invitations. If you look near the end of that chapter, right before the last group of verses, you will read: [you/the monk] should offer a sitting-down meal to bhikṣus or bhikṣuṇīs who pass by. How can we offer to other monks something that we, as monks, must avoid [accepting meals]? Isnt that a contradition? What am i not understanding here?

Thank you for clarifying such questions.

You should read this sutra, its a good Dharma teaching in my opinion. My thanks to the member (cannot remember who was) that posted the link to this sutra at some weeks ago, on other thread.

Cease all thoughts and be vigilant for a given period of time, never distracted.Progress energetically, never negligent or indolent.Do not count the years, nor feel tired in a single day.Hold one thought, never losing it.Avoid sleep and keep the mind alert.

The context is about being energetic, alert & not lazy or befuddled. Sleeping too much befogs the mind, so cut back on the amount of sleep. In some monasteries only 4 or 5 hours a night are suggested. But one may have to work up to those few hours.

1) In Chapter 5, in the first poem/group of verses, it is said that one should avoid sleep. One cannot avoid sleep. It is known that not sleeping brings mental ilness and physical weekness. In fact its used as a form of torture. So, how can we understand such advice: avoid sleep?

Avoid sleep means don't sleep too much because when you sleep you are not aware. So sleep enough. Monks only sleep 4 hours per day. Don't be attached to sleep in other words.

2) In the same chapter and in the same group of verses it is state: always beg for food, not acepting meal invitations. If you look near the end of that chapter, right before the last group of verses, you will read: [you/the monk] should offer a sitting-down meal to bhikṣus or bhikṣuṇīs who pass by. How can we offer to other monks something that we, as monks, must avoid [accepting meals]? Isnt that a contradition? What am i not understanding here?.

Beg for food-eat whatever given. Monks should have no desire for meal invitations. Yes, monks can accept meal invitations only because they want help commoners generate merits. When you give monks food, you generate merits. So in other words, don't be attached to eating.

There are 5 forms of attachment: Wealth (money), sex, fame, food, and sleep. These are major obstacles that prevent us from becoming enlightened.

NAMO AMITABHANAM MO A DI DA PHAT (VIETNAMESE)NAMO AMITUOFO (CHINESE)Linjii―Listen! Those of you who devote yourselves to the Dharma must not be afraid of losing your bodies and your lives―